Redo patches to be more robust

[FortyTwoFortyTwo]

Patches tends to easily break from TF2 update for both windows and linux, and can be painful to maintain it. This PR updates it to try make it last worthwhile.

• CTFPlayer::GetMaxHealthForBuffing and CTFPlayer::Event_KilledOther patches are removed, replacing with hooks to manually update it. Would be insane if future TF2 were to actually edit these functions with whatever balance changes.
• CTFPlayer::TeamFortress_CalculateMaxSpeed patches is updated to automatically scan any of the playerclass == TF_CLASS_* instructions found in function, and updates TF_CLASS_* value to whichever class is currently at. There are safety checks that it would not attempt to patch if unexpected amount is found.
• CTFPlayer::IsPlayerClass patch is unchanged, it's a small function that should be simple enough to maintain it.

Also while at it, refactor dhooks and sdktools for things blah blah blah.